I just passed my C_IBP_2005 Certification with a score of 83%.Thanks to the site. Although I read all the materials but I started to practise I realise I wasnt prepared enough.The practise problem helped me alot to get to the level of feeeling comfortable.
The amazing thing is about 70% of the questions were similiar only that a good percentage had different multiple choice which made it a little tricky. My advice for anyone would be to study the material and when using the practise questions, understand the reason for the answers provided and also why the other options are wrong. That way no matter how tricky the final exam is you are definitely good.